Validation of the multi-satellite merged sea surface salinity in the South China Sea

Huipeng WANG; Junqiang SONG; Chengwu ZHAO; Xiangrong YANG; Hongze LENG; Nan ZHOU

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Validation of the multi-satellite merged sea surface salinity in the South China Sea

Physics | Updated：2024-10-12

- Validation of the multi-satellite merged sea surface salinity in the South China Sea
- Journal of Oceanology and Limnology Vol. 41, Issue 6, Pages: 2033-2044(2023)
- Affiliations：
  
  1.College of Meteorology and Oceanography, National University of Defense Technology, Changsha 410073, China
  2.Troop 61741, PLA, Beijing 100094, China
- Author bio：
  
  zhaochengwu12@nudt.edu.cn
- Funds：
- DOI：
  CLC：
- Received：11 April 2022，
  
  Accepted：22 June 2022，
  
  Online First：18 October 2022，
  
  Published：01 November 2023
- Accepted：
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WANG Huipeng,SONG Junqiang,ZHAO Chengwu,et al.Validation of the multi-satellite merged sea surface salinity in the South China Sea[J].Journal of Oceanology and Limnology,2023,41(06):2033-2044.
DOI：

WANG Huipeng,SONG Junqiang,ZHAO Chengwu,et al.Validation of the multi-satellite merged sea surface salinity in the South China Sea[J].Journal of Oceanology and Limnology,2023,41(06):2033-2044. DOI：

摘要

Abstract

Sea surface salinity (SSS) is an essential variable of ocean dynamics and climate research. The Soil Moisture and Ocean Salinity (SMOS)

Aquarius

and Soil Moisture Active Passive (SMAP) satellite missions all provide SSS measurements. The European Space Agency (ESA) Climate Change Initiative Sea Surface Salinity (CCI-SSS) project merged these three satellite SSS data to produce CCI L4 SSS products. We validated the accuracy of the four satellite products (CCI

SMOS

Aquarius

and SMAP) using in-situ gridded data and Argo floats in the South China Sea (SCS). Compared with in-situ gridded data

it shows that the CCI achieved the best performance (RMSD: 0.365) on monthly time scales. The RMSD of SMOS

Aquarius

and SMAP (SMOS: 0.389; Aquarius: 0.409; SMAP: 0.391) are close

and the SMOS takes a slight advantage in contrast with Aquarius and SMAP. Large discrepancies can be found near the coastline and in the shelf seas. Meanwhile

CCI with lower RMSD (0.295) perform better than single satellite data (SMOS: 0.517; SMAP: 0.297) on weekly time scales compared with Argo floats. Overall

the merged CCI have the smallest RMSD among the four satellite products in the SCS on both weekly time scales and monthly time scales

which illustrates the improved accuracy of merged CCI compared with the individual satellite data.

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references

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